i got a similar set up with Mike.. i got the 28amp power supply. i run my yokomo double charger and my yokomo single charger on it along with my team much more racing CTX-m (motor management thingy)
all three chargers are charging batteries at 6amps..and i can use my lathe with the CTX-m.
all with no problems. just dont drop it too many times
you should be good with this power supply.